Django Rest framework 序列化

1 序列化入门

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class RoleSerializer(serializers.Serializer):     id = serializers.IntegerField()     title = serializers.CharField()     label = serializers.CharField()

2 进阶序列化1

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class UserSerializer(serializers.Serializer):     id = serializers.IntegerField()     username = serializers.CharField()     nick_name = serializers.CharField()     password = serializers.CharField()     state = serializers.BooleanField()     is_super = serializers.BooleanField()     last_login = serializers.DateTimeField()       #一对一关系     #roles = serializers.CharField(source="roles.title")       # 多对多,SerializerMethodField(),表示自定义显示     # 然后写一个自定义的方法     roles = serializers.SerializerMethodField()       def get_roles(self,row):         role_obj = row.roles.all()         ret = []         for i in role_obj:             ret.append({'id':i.id,'title':i.title})         return ret

3 进阶序列化2

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class UserSerializer(serializers.ModelSerializer):     #一对一关系     #roles = serializers.CharField(source="roles.title")       # 多对多,SerializerMethodField(),表示自定义显示     # 然后写一个自定义的方法     roles = serializers.SerializerMethodField()       def get_roles(self,row):         role_obj = row.roles.all()         ret = []         for i in role_obj:             ret.append({'id':i.id,'title':i.title})         return ret     class Meta:         model = models.Users         fields = ['id','username','nick_name','password','roles']

4 序列化进阶3，自动序列化连表

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class UserSerializer(serializers.ModelSerializer):     class Meta:         model = models.Users         fields = "__all__"         # 连表的深度         depth = 1

5 序列化进阶4，生成URL

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class UserSerializer(serializers.ModelSerializer):     roles = serializers.HyperlinkedIdentityField(view_name='roleId',many=True,lookup_url_kwarg='id')     class Meta:         model = models.Users         fields = "__all__"         # 连表的深度         depth = 1class UsersView(APIView):     def get(self,request,*args,**kwargs):         ret = {'code':1000,'msg':None,'data':None}         try:             obj = models.Users.objects.all()             #使用HyperlinkedIdentityField生成URL，这里必须要传参数context={'request':request}             ser = rbac_serializers.UserSerializer(instance=obj, many=True,context={'request':request})             ret['data'] = ser.data         except Exception as e:             logger.error(e)         return Response(ret)

　　

6 序列化进阶5，自定义验证规则

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#定义验证规则<br>class GroupValidation(object):     def __init__(self,base):         self.base = base 　　 #__call__()，该方法的功能类似于在类中重载 () 运算符，使得类实例对象可以像调用普通函数那样，以“对象名()”的形式使用     def __call__(self, value):         if not value.startswith(self.base):             message = "标题必须以%s为开头"%self.base             raise serializers.ValidationError(message)     class UserGroupSerializer(serializers.Serializer):<br>　　 #序列化中加入字段校验     title = serializers.CharField(validators=[GroupValidation('以我开头'),])   class UserGroupView(APIView):     def post(self,request,*args, **kwargs):         ser = UserGroupSerializer(data=request.data)         if ser.is_valid():             print(ser.validated_data['title'])         else:             print(ser.errors)           return HttpResponse("用户提交数据验证")